18403-20-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18403-20-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,4,0 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 18403-20:
(7*1)+(6*8)+(5*4)+(4*0)+(3*3)+(2*2)+(1*0)=88
88 % 10 = 8
So 18403-20-8 is a valid CAS Registry Number.
18403-20-8Relevant articles and documents
Regioselective Protection Strategies for D-Xylopyranosides
Helm, Richard F.,Ralph, John,Anderson, Laurens
, p. 7015 - 7021 (2007/10/02)
The acylation of D-xylopyranosides can be effected at any position by selective hydroxyl activation with dibutyltin oxide in refluxing benzene and proper choice of starting anomer.Methyl 4-O-benzyl-β-D-xylopyranoside, available from methyl 2,3-O-isopropyl